Implement use of PlaceholderProj and PlaceholderTile

Content/Projectiles/Protogen/ProtogenOperativeNanite.cs

@@ -11,6 +11,8 @@ namespace ForgottenWawiTech.Content.Projectiles.Protogen
         private const float HomingStrength = 0.14f;
         private const float DesiredSpeed = 14f;
 
+        public override string Texture => "ForgottenWawiTech/Assets/PlaceholderProj";
+        
         public override void SetStaticDefaults()
         {
             ProjectileID.Sets.MinionShot[Type] = true;

Content/Projectiles/Protogen/ProtogenSentinelCore.cs

@@ -16,6 +16,8 @@ namespace ForgottenWawiTech.Content.Projectiles.Protogen
         private const float TargetRange = 950f;
         private const float BeamVelocity = 18f;
 
+        public override string Texture => "ForgottenWawiTech/Assets/PlaceholderProj";
+
         public override void SetStaticDefaults()
         {
             ProjectileID.Sets.MinionSacrificable[Type] = false;

Content/Projectiles/Protogen/ProtogenSentinelCoreBeam.cs

@@ -9,6 +9,8 @@ namespace ForgottenWawiTech.Content.Projectiles.Protogen
 {
     public class ProtogenSentinelCoreBeam : ModProjectile
     {
+
+        public override string Texture => "ForgottenWawiTech/Assets/PlaceholderProj";
         public override void SetStaticDefaults()
         {
             ProjectileID.Sets.MinionShot[Type] = true;

Content/Projectiles/Protogen/ProtogenSentinelFragment.cs

@@ -9,6 +9,8 @@ namespace ForgottenWawiTech.Content.Projectiles.Protogen
 {
     public class ProtogenSentinelFragment : ModProjectile
     {
+
+        public override string Texture => "ForgottenWawiTech/Assets/PlaceholderProj";
         private const float HomingRange = 560f;
         private const float HomingStrength = 0.18f;
         private const float DesiredSpeed = 15f;